Noctua has upgraded its lineup of CPU coolers for AMD Opteron servers and workstations. The two new coolers, NH-U12DO A3 and NH-U9DO A3, are equipped with two Noctua NF-P12 120mm or NF-B9 92mm fans to achieve improved quiet cooling performance and support AMD's socket G34 platform. The coolers are based on Noctua's NH-U series which have six heatpipes, a performance optimized fin stack and an enlarged contact surface suitable for socket G34 CPUs allow for further improved performance. The units make use of NM-A3 SecuFirm2 mounting system, which gives the NH-U12DO A3 and NH-U9DO A3 support for both Socket F and the newer G34 and C32 sockets. Both coolers can be installed rotated by 90° for added flexibility and to allow optimal positioning which can be especially critical on dual socket motherboards.